Dance troupe SIRO-A lights up the AGT stage with a performance called Summer.\r<br>\r<br>\r<br>\r<br>Young comedian Drew Lynch looks to win Americas hearts, laughs and votes in the AGT semifinals.\r<br>\r<br>\r<br>\r<br>Mentalist Oz Pearlman turns in another mind-bending performance, hoping for a place in the finals.
